Lehigh County Voter Registration Director Stacey Sterner says her phones are again ringing off the hook and her judges of elections are again reporting busy polling places as voters cast ballots on the way home from work.

Somehow, some non-partisan voters failed to get the message that they needed to register with the Democratic party in order to vote for Barack Obama or Hillary Clinton in the primary election.

"Our biggest problem of the day, as is across the state, is that the nonpartisan voters cannot vote in a Pennsylvania primary," Sterner said.